Functional calendar top view on iOS #progrs

#acnh Switch to modal-based approach so I can show an entire month worth of dates because ppl are already asking about next weekend and complaining that the calendar only shows the next 3 days, which clearly is not enough

#toiletofbliss Refactor calendar data model to clean up template/controller and so I can grab the calendar data for arbitrary ranges

Made calendar view for dark and light mode #progrs

Fixed bug where tapping on previous week on calendar view shows few weeks back timeline #progrs